Path-polarization hyperentangled and cluster states of photons on a chip

Light, Science & Applications
Mario Arnolfo CiampiniPaolo Mataloni

Abstract

Encoding many qubits in different degrees of freedom (DOFs) of single photons is one of the routes toward enlarging the Hilbert space spanned by a photonic quantum state. Hyperentangled photon states (that is, states showing entanglement in multiple DOFs) have demonstrated significant implications for both fundamental physics tests and quantum communication and computation. Increasing the number of qubits of photonic experiments requires miniaturization and integration of the basic elements, and functions to guarantee the setup stability, which motivates the development of technologies allowing the precise control of different photonic DOFs on a chip. We demonstrate the contextual use of path and polarization qubits propagating within an integrated quantum circuit. We tested the properties of four-qubit linear cluster states built on both DOFs, and we exploited them to perform the Grover's search algorithm according to the one-way quantum computation model. Our results pave the way toward the full integration on a chip of hybrid multi-qubit multiphoton states.

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Citations

Nov 14, 2018·Reports on Progress in Physics·Fulvio FlaminiFabio Sciarrino
Sep 14, 2017·Scientific Reports·Ioannis PitsiosRoberto Osellame
Oct 3, 2018·Optics Letters·Li DongYa-Jun Gao
Jun 15, 2019·Optics Letters·Jun GuanMartin J Booth
Aug 8, 2019·Nature Communications·Jeremy C AdcockMark G Thompson
Oct 14, 2017·Optics Letters·I V DyakonovS P Kulik
Sep 1, 2018·Light, Science & Applications·Lucia CaspaniDavid J Moss
Dec 8, 2017·Scientific Reports·Mario A CiampiniMarco Barbieri

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Methods Mentioned

BETA
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